I understand the temptation to learn as little as possible to get a good score, but what you're asking has no good answer. I can't tell you exactly what will be on your exam and if something you learn from craig's videos will get you a particular question correct. I suggest you prioritize when you are studying for the biology. By that I mean, don't spend hours studying nitty gritty taxonomy stuff if you're not solid on the basics of another topic (hormones, photosynthesis, whatever). If you cant draw out all the stages of the cell cycle, you shouldn't be wasting your time memorizing if cartilaginous or jawless fish came first. How deeply you learn bio should be largely dependent on how much time you have and how well you're prepared for the other sections.
But if you want a simple answer to your question: yep, learn it, it can't hurt.